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-rw-r--r--src/engine.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/engine.cpp b/src/engine.cpp
index 04f483bb8..2e3901393 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -39,7 +39,7 @@ EngineOverrideManager _engine_mngr;
/** Year that engine aging stops. Engines will not reduce in reliability
* and no more engines will be introduced */
-Year _year_engine_aging_stops;
+static Year _year_engine_aging_stops;
/** Number of engines of each vehicle type in original engine data */
const uint8 _engine_counts[4] = {